Statement-1: In graphite, on increasing the temperature the conductivity decreases along the layers of carbon atoms. 

Statement-2: Graphite cleaves easily, because the force of attraction between the layers is weak van der Waal's force

In graphite, on increasing the temperature the conductivity decreases along the layers of carbon atoms. Because the thermal conductivity of graphite decreases as temperature rises, the electrical conductivity of the material increases.

Graphite cleaves easily, because the force of attraction between the layers is weak van der Waal's force. Because the weak Van der Waals forces, such as those that attract and repel atoms, molecules, and surfaces as well as other intermolecular interactions, hold layers of stacked graphene sheets—which make up graphite—together.